UC3843A

활성

8.4V/7.6V UVLO 100% 듀티 사이클, 0°C~70°C를 지원하는 30V, 1A, 500KHz 전류 모드 PWM 컨트롤러

지금 주문

데이터 시트

document-pdfAcrobat UCx84xA Current-Mode PWM Controller datasheet (Rev. H) (영어) PDF | HTML

UC3843A

활성

데이터 시트

지금 주문

제품 상세 정보

Vin (max) (V)

28

Operating temperature range (°C)

0 to 70

Control mode

Current

Topology

Boost, Buck, Flyback, Forward

Rating

Catalog

Features

Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Fixed frequency, Multi-topology

Duty cycle (max) (%)

100

Vin (max) (V)

28

Operating temperature range (°C)

0 to 70

Control mode

Current

Topology

Boost, Buck, Flyback, Forward

Rating

Catalog

Features

Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Fixed frequency, Multi-topology

Duty cycle (max) (%)

100

PDIP (P)

8

92.5083 mm² 9.81 x 9.43

SOIC (D)

8

29.4 mm² 4.9 x 6

SOIC (D)

14

51.9 mm² 8.65 x 6

Optimized for Off-Line and DC-DC Converters
Low Start-Up Current (< 0.5mA)
Trimmed Oscillator Discharge Current
Automatic Feedforward Compensation
Pulse-by-Pulse Current Limiting
Enhanced Load Response Characteristics
Undervoltage Lockout With Hysteresis
Double Pulse Suppression
High-Current Totem Pole Output
Internally-Trimmed Bandgap Reference
Up to 500kHz Operation
Create a Custom Design Using the UCx84xA With the WEBENCH Power Designer

Optimized for Off-Line and DC-DC Converters
Low Start-Up Current (< 0.5mA)
Trimmed Oscillator Discharge Current
Automatic Feedforward Compensation
Pulse-by-Pulse Current Limiting
Enhanced Load Response Characteristics
Undervoltage Lockout With Hysteresis
Double Pulse Suppression
High-Current Totem Pole Output
Internally-Trimmed Bandgap Reference
Up to 500kHz Operation
Create a Custom Design Using the UCx84xA With the WEBENCH Power Designer

The UCx84xA family of control devices is a pin-for-pin compatible improved version of the UCx84x family. Providing the necessary features to control current-mode or switched-mode power supplies, this family of devices has many improved features: startup current is less than 0.5mA, oscillator discharge is trimmed to 8.3mA, and during UVLO, the output stage can sink at least 10mA at less than 1.2V for VCC over 5V.

filter

기타 AC/DC 및 DC/DC 컨트롤러(외장 FET) 찾기

다운로드 스크립트와 함께 비디오 보기 동영상

관심 가지실만한 유사 제품

open-in-new

대안 비교

비교 대상 장치와 동일한 기능을 지원하는 핀 대 핀

TL2843B

활성

8.4V/7.6V UVLO, 100% 듀티 사이클, -40C~85C를 지원하는 30V, 0.2A 고성능 500KHz 전류 모드 PWM Wider temperature range

UCC28C53

활성

산업용, 30V, 저전력 전류 모드 PWM 컨트롤러, 8.4V/7.6V UVLO, 100% 듀티 사이클 Lower startup and supply current, better reference voltage accuracy and faster overcurrent protection

UCC38C43

활성

상업용, 20V, 저전력 전류 모드 PWM 컨트롤러, 8.4V/7.6V UVLO, 100% 듀티 사이클 Pin-to-pin equivalent with BiCMOS low-power consumption

기술 자료

star

=TI에서 선정한 이 제품의 인기 문서

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12개 모두 보기

	유형	직함		날짜
*	Data sheet	UCx84xA Current-Mode PWM Controller datasheet (Rev. H)	PDF \| HTML	2024/10/11
	Application note	Conditioning a Switch-mode Power Supply Current Signal Using TI Op Amps (Rev. A)	PDF \| HTML	2021/06/11
	Application note	Understanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B)		2019/03/12
	Selection guide	Power Management Guide 2018 (Rev. R)		2018/06/25
	Application note	UCC38C42 Family of High-Speed BiCMOS Current-Mode PWM Controllers		2002/02/07
	Application note	DN-26 UC3842A Low-Cost Start-up and Fault Protection Circuit		1999/09/05
	Application note	DN-27 UC1842/UC1842A Family - Summary of Functional Differences		1999/09/05
	Application note	DN-29 UC3842A Family - Frequency Foldback Technique Provides Protection		1999/09/05
	Application note	DN-30 Programmable Electronic Circuit Breaker		1999/09/05
	Application note	DN-40 The Effects of Oscillator Discharge Current Variations on Maximum Duty		1999/09/05
	Application note	DN-42A Design Considerations for Transitioning from UC3842 to the New UCC3802		1999/09/05
	Application note	U-111, Practical Considerations in Current Mode Power Supplies		1999/09/05